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| cla_gercond_x.f(3) | LAPACK | cla_gercond_x.f(3) |
NAME¶
cla_gercond_x.f -SYNOPSIS¶
Functions/Subroutines¶
REAL function cla_gercond_x (TRANS, N, A, LDA, AF, LDAF, IPIV, X, INFO, WORK, RWORK)
Function/Subroutine Documentation¶
REAL function cla_gercond_x (characterTRANS, integerN, complex, dimension( lda, * )A, integerLDA, complex, dimension( ldaf, * )AF, integerLDAF, integer, dimension( * )IPIV, complex, dimension( * )X, integerINFO, complex, dimension( * )WORK, real, dimension( * )RWORK)¶
CLA_GERCOND_X Purpose: CLA_GERCOND_X computes the infinity norm condition number of
op(A) * diag(X) where X is a COMPLEX vector.
TRANS
N
A
LDA
AF
LDAF
IPIV
X
INFO
WORK
RWORK
Author:
TRANS is CHARACTER*1
Specifies the form of the system of equations:
= 'N': A * X = B (No transpose)
= 'T': A**T * X = B (Transpose)
= 'C': A**H * X = B (Conjugate Transpose = Transpose)
N is INTEGER
The number of linear equations, i.e., the order of the
matrix A. N >= 0.
A is COMPLEX array, dimension (LDA,N)
On entry, the N-by-N matrix A.
LDA is INTEGER
The leading dimension of the array A. LDA >= max(1,N).
AF is COMPLEX array, dimension (LDAF,N)
The factors L and U from the factorization
A = P*L*U as computed by CGETRF.
LDAF is INTEGER
The leading dimension of the array AF. LDAF >= max(1,N).
IPIV is INTEGER array, dimension (N)
The pivot indices from the factorization A = P*L*U
as computed by CGETRF; row i of the matrix was interchanged
with row IPIV(i).
X is COMPLEX array, dimension (N)
The vector X in the formula op(A) * diag(X).
INFO is INTEGER
= 0: Successful exit.
i > 0: The ith argument is invalid.
WORK is COMPLEX array, dimension (2*N).
Workspace.
RWORK is REAL array, dimension (N).
Workspace.
Univ. of Tennessee
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
Date:
November 2011
Author¶
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